I have had lots of people asking me about LPG on my Evo, so thought I’d put all the info in 1 place. This will save my ‘typing finger’ getting worn out!
Car was converted by previous owner -
READ THIS THREAD Cost
£1837.64 (inc VAT) - up in Halifax by Autogas 2000 Ltd 01845 523213. I believe they needed it for a few days. The manufacturer is
Tartarini – an Italian company.
Swapping over fuels is seamless: It starts on petrol and switches over automatically when engine coolant is at the right temperature to convert the ‘liquid gas’ back to a gas.
It is possible to select petrol only if required. (you must be mad)
When booting it, petrol is used. It switches automatically at approx 4k RPM
There are systems which use LPG ‘full-time’ throughout the rev range, but these require bigger injectors, or even 2 injectors per cylinder. Under these circumstances there might be issues with tuning, but I can't comment on this. I know of one guy who has to have 2 separate ECUs – one for each fuel. Mine is a ‘piggy-back’ system that connects to the Evo injector plugs.
Consumption is slightly more than petrol - for example the injector may be open for 10 milliseconds on petrol, and 12 milliseconds on gas.
Is it worth it? - hell yes, it breaks my heart when I use all the gas and have to go on to petrol - I wouldn't own the car if gas was not an option.
I logged what fuel I used over 1172 miles:
(600 miles on motorway, 200 sensible travel to work on 30-60mph ‘A’ roads, 300ish thrashing round country lanes, the rest town driving)
Gas = 240L (£130)
Petrol = 32L (£30)
Total spend = £160
Total spend
IF used just petrol = £260ish
SAVING = £100
Price per mile is about 13p, my Smart4two is 9p
When I fill the tanks, between 4-8 tanks (40ish Litres) of LPG to 1 tank of petrol. - Depending on driving.
£24 of gas gives me between 160 & 200 miles. (160 motorway [just gas], 200 town/lane/fun [also using petrol when on higher boost])
The only 2 faults I have with it -
1) The filler cap is in the bumper.
2) Tank is not big enough! 48L - maybe getting additional 20L fitted! (Then people may have a 'valid' issue with weight distribution)
The car has done ~14k miles since conversion and is currently ~86k miles on the clock.
48Litre tank in the boot
Ditto
The injectors/vaporiser (Blue/Red)
The CPU/ECU
